/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android.result.supplement;

import android.content.Context;
import android.os.Handler;
import android.text.Html;
import android.widget.TextView;

import com.google.zxing.client.android.HttpHelper;
import com.google.zxing.client.android.R;
import com.google.zxing.client.android.history.HistoryManager;
import com.google.zxing.client.android.LocaleManager;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

final class ProductResultInfoRetriever extends SupplementalInfoRetriever {

    private static final Pattern PRODUCT_NAME_PRICE_PATTERN =
            Pattern.compile("owb63p\">([^<]+).+zdi3pb\">([^<]+)");


    private final String productID;
    private final String source;
    private final Context context;

    ProductResultInfoRetriever(TextView textView,
                               String productID,
                               Handler handler,
                               HistoryManager historyManager,
                               Context context) {
        super(textView, handler, historyManager);
        this.productID = productID;
        this.source = context.getString(R.string.msg_google_product);
        this.context = context;
    }

    @Override
    void retrieveSupplementalInfo() throws IOException, InterruptedException {

        String encodedProductID = URLEncoder.encode(productID, "UTF-8");
        String uri = "http://www.google." + LocaleManager.getProductSearchCountryTLD(context)
                + "/m/products?ie=utf8&oe=utf8&scoring=p&source=zxing&q=" + encodedProductID;
        String content = HttpHelper.downloadViaHttp(uri, HttpHelper.ContentType.HTML);

        Matcher matcher = PRODUCT_NAME_PRICE_PATTERN.matcher(content);
        if (matcher.find()) {
            append(productID,
                    source,
                    new String[]{unescapeHTML(matcher.group(1)), unescapeHTML(matcher.group(2))},
                    uri);
        }
    }

    private static String unescapeHTML(String raw) {
        return Html.fromHtml(raw).toString();
    }

}
